Ntumi, Simon, Sheilla Agbenyo, and Tapela Bulala. “Estimating the Psychometric Properties (Item Difficulty, Discrimination and Reliability Indices) of Test Items Using Kuder-Richardson Approach (KR-20)”. Shanlax International Journal of Education 11, no. 3 (June 1, 2023): 18-28. Accessed July 18, 2024. https://shanlaxjournals.in/journals/index.php/education/article/view/6081.